diff --git a/competition/migrations/0003_alter_series_options_alter_publication_file.py b/competition/migrations/0003_alter_series_options_alter_publication_file.py
new file mode 100644
index 0000000..a1ccb59
--- /dev/null
+++ b/competition/migrations/0003_alter_series_options_alter_publication_file.py
@@ -0,0 +1,29 @@
+# Generated by Django 4.2.17 on 2024-12-15 11:12
+
+import base.models
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("competition", "0002_initial"),
+    ]
+
+    operations = [
+        migrations.AlterModelOptions(
+            name="series",
+            options={
+                "ordering": ["semester", "order"],
+                "verbose_name": "séria",
+                "verbose_name_plural": "série",
+            },
+        ),
+        migrations.AlterField(
+            model_name="publication",
+            name="file",
+            field=base.models.RestrictedFileField(
+                blank=True, upload_to="publications/%Y/", verbose_name="súbor"
+            ),
+        ),
+    ]
diff --git a/competition/models.py b/competition/models.py
index a195784..ab8b74e 100644
--- a/competition/models.py
+++ b/competition/models.py
@@ -738,7 +738,9 @@ class Meta:
     file = RestrictedFileField(
         upload_to='publications/%Y/',
         content_types=['application/pdf', 'application/zip'],
-        verbose_name='súbor')
+        verbose_name='súbor',
+        blank=True,
+    )
 
     order = models.PositiveSmallIntegerField(
         verbose_name='poradie', null=True, blank=True)
diff --git a/competition/views.py b/competition/views.py
index 542c13d..fb0d52f 100644
--- a/competition/views.py
+++ b/competition/views.py
@@ -957,12 +957,27 @@ def perform_create(self, serializer):
         Vola sa pri vytvarani objektu,
         checkuju sa tu permissions, ci user vie vytvorit publication v danom evente
         '''
+        self._ensure_file_attached(serializer)
+
         if Publication.can_user_create(self.request.user, serializer.validated_data):
             serializer.save()
         else:
             raise exceptions.PermissionDenied(
                 'Nedostatočné práva na vytvorenie tohoto objektu')
 
+    def perform_update(self, serializer):
+        if not serializer.partial:
+            self._ensure_file_attached(serializer)
+
+        return super().perform_update(serializer)
+
+    @staticmethod
+    def _ensure_file_attached(serializer: PublicationSerializer):
+        if 'file' not in serializer.validated_data:
+            raise exceptions.ValidationError(
+                'Publikácia musí mať pripojený súbor'
+            )
+
 
 class GradeViewSet(viewsets.ReadOnlyModelViewSet):
     """Ročníky riešiteľov (Z9,S1 ...)"""